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Vulnerability details: VCID-fpg2-nhey-rkcc
Vulnerability ID VCID-fpg2-nhey-rkcc
Aliases CVE-2023-27530
GHSA-3h57-hmj3-gj3p
GMS-2023-663
Summary Rack has possible DoS Vulnerability in Multipart MIME parsing There is a possible DoS vulnerability in the Multipart MIME parsing code in Rack. This vulnerability has been assigned the CVE identifier CVE-2023-27530. Versions Affected: All. Not affected: None Fixed Versions: 3.0.4.2, 2.2.6.3, 2.1.4.3, 2.0.9.3 # Impact The Multipart MIME parsing code in Rack limits the number of file parts, but does not limit the total number of parts that can be uploaded. Carefully crafted requests can abuse this and cause multipart parsing to take longer than expected. All users running an affected release should either upgrade or use one of the workarounds immediately. # Workarounds A proxy can be configured to limit the POST body size which will mitigate this issue.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (5)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-770 Allocation of Resources Without Limits or Throttling
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-400 Uncontrolled Resource Consumption
CWE-20 Improper Input Validation
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-27530.json
epss 0.0209 https://api.first.org/data/v1/epss?cve=CVE-2023-27530
epss 0.0209 https://api.first.org/data/v1/epss?cve=CVE-2023-27530
epss 0.02133 https://api.first.org/data/v1/epss?cve=CVE-2023-27530
epss 0.02133 https://api.first.org/data/v1/epss?cve=CVE-2023-27530
epss 0.02133 https://api.first.org/data/v1/epss?cve=CVE-2023-27530
epss 0.02311 https://api.first.org/data/v1/epss?cve=CVE-2023-27530
epss 0.02311 https://api.first.org/data/v1/epss?cve=CVE-2023-27530
epss 0.02311 https://api.first.org/data/v1/epss?cve=CVE-2023-27530
cvssv3 7.5 https://discuss.rubyonrails.org/t/cve-2023-27530-possible-dos-vulnerability-in-multipart-mime-parsing/82388
cvssv3.1 7.5 https://discuss.rubyonrails.org/t/cve-2023-27530-possible-dos-vulnerability-in-multipart-mime-parsing/82388
generic_textual HIGH https://discuss.rubyonrails.org/t/cve-2023-27530-possible-dos-vulnerability-in-multipart-mime-parsing/82388
ssvc Track https://discuss.rubyonrails.org/t/cve-2023-27530-possible-dos-vulnerability-in-multipart-mime-parsing/82388
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-3h57-hmj3-gj3p
cvssv3.1 7.5 https://github.com/rack/rack
generic_textual HIGH https://github.com/rack/rack
cvssv3.1 7.5 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2023-27530.yml
generic_textual HIGH https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2023-27530.yml
cvssv3.1 7.5 https://lists.debian.org/debian-lts-announce/2023/04/msg00017.html
generic_textual HIGH https://lists.debian.org/debian-lts-announce/2023/04/msg00017.html
ssvc Track https://lists.debian.org/debian-lts-announce/2023/04/msg00017.html
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2023-27530
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2023-27530
cvssv3.1 7.5 https://security.netapp.com/advisory/ntap-20231208-0015
generic_textual HIGH https://security.netapp.com/advisory/ntap-20231208-0015
cvssv3.1 7.5 https://security.netapp.com/advisory/ntap-20231208-0015/
ssvc Track https://security.netapp.com/advisory/ntap-20231208-0015/
cvssv3.1 7.5 https://www.debian.org/security/2023/dsa-5530
generic_textual HIGH https://www.debian.org/security/2023/dsa-5530
ssvc Track https://www.debian.org/security/2023/dsa-5530
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-27530.json
https://api.first.org/data/v1/epss?cve=CVE-2023-27530
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-30122
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-30123
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-44570
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-44571
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-44572
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-27530
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-27539
https://discuss.rubyonrails.org/t/cve-2023-27530-possible-dos-vulnerability-in-multipart-mime-parsing/82388
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/rack/rack
https://lists.debian.org/debian-lts-announce/2023/04/msg00017.html
https://security.netapp.com/advisory/ntap-20231208-0015
https://www.debian.org/security/2023/dsa-5530
1032803 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1032803
2176477 https://bugzilla.redhat.com/show_bug.cgi?id=2176477
CVE-2023-27530 https://nvd.nist.gov/vuln/detail/CVE-2023-27530
CVE-2023-27530.YML https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2023-27530.yml
GHSA-3h57-hmj3-gj3p https://github.com/advisories/GHSA-3h57-hmj3-gj3p
ntap-20231208-0015 https://security.netapp.com/advisory/ntap-20231208-0015/
RHSA-2023:1961 https://access.redhat.com/errata/RHSA-2023:1961
RHSA-2023:1981 https://access.redhat.com/errata/RHSA-2023:1981
RHSA-2023:2652 https://access.redhat.com/errata/RHSA-2023:2652
RHSA-2023:3082 https://access.redhat.com/errata/RHSA-2023:3082
RHSA-2023:3403 https://access.redhat.com/errata/RHSA-2023:3403
RHSA-2023:6818 https://access.redhat.com/errata/RHSA-2023:6818
USN-6837-1 https://usn.ubuntu.com/6837-1/
USN-6905-1 https://usn.ubuntu.com/6905-1/
USN-7036-1 https://usn.ubuntu.com/7036-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-27530.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://discuss.rubyonrails.org/t/cve-2023-27530-possible-dos-vulnerability-in-multipart-mime-parsing/82388
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-10-15T17:29:06Z/ Found at https://discuss.rubyonrails.org/t/cve-2023-27530-possible-dos-vulnerability-in-multipart-mime-parsing/82388
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/rack/rack
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2023-27530.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://lists.debian.org/debian-lts-announce/2023/04/msg00017.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-10-15T17:29:06Z/ Found at https://lists.debian.org/debian-lts-announce/2023/04/msg00017.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2023-27530
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://security.netapp.com/advisory/ntap-20231208-0015
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://security.netapp.com/advisory/ntap-20231208-0015/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-10-15T17:29:06Z/ Found at https://security.netapp.com/advisory/ntap-20231208-0015/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://www.debian.org/security/2023/dsa-5530
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

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none

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-10-15T17:29:06Z/ Found at https://www.debian.org/security/2023/dsa-5530
Exploit Prediction Scoring System (EPSS)
Percentile 0.83975
EPSS Score 0.0209
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:51:00.011552+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/gem/rack/GMS-2023-663.yml 38.0.0